KW Rocketry v2.7

Updated to 2.7
- 1.02 compatibility update.
- Rebalanced ISPs to account for new aerodynamics.
- Rebalanced and changed thermal properties to account for the new system.
- Converted the majority of textures to .dds producing an overall ram saving of about 25%.
- Updated engines with the latest FX modules.
- Fixed node issues brought on by v1.0 update.
- Old FAR compatible fairings moved to extras folder.
- New procedural fairings added until a better alternative is utilised.
- Parts in defunct research nodes have been moved to the next best alternative.
- Subassemblies split into legacy (for old FAR compatible fairings) and default (for the new default procedural fairings).
- Misc Minor bugfixes.